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Components
Service manual
274
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
3.10 Inverter PCB
3.10.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the inverter PCB
Prerequisite:
Stop the unit operation via the central controller.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
315].
Prerequisite:
Access the switch box, see
1
Turn ON the power of the unit.
2
Measure the voltage between the following wires on the inverter PCB.
Result:
All measurements MUST be 400 V AC.
▪
L1B –L2B
▪
L1B –L3B
▪
L2B –L3B
b
a
c
a
Wire L1B
b
Wire L2B
c
Wire L3B
Does the inverter PCB receive power?
Action
Yes
and continue with the next procedure.
No
Continue with the next step.
3
Perform an electrical check of the noise filter PCB, see
To check the HAP LED of the inverter PCB
1
First perform a power check of the inverter PCB, see
INFORMATION
Make sure that the inverter PCB is NOT in stand‑by mode. The HAP LED will NOT
blink when in stand‑by mode.
2
If needed wake up the PCB by performing one of the following actions:
Summary of Contents for VRV IV+
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